A chemist would like to dilute a 90-cc solution that is 5% acid to one that is 3% acid. How much water must be added to accomplish this task? (cc stands for cubic centimeters)

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)